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Related Experiment Video

Updated: Jun 17, 2026

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown
09:40

Measurement and Analysis of Atomic Hydrogen and Diatomic Molecular AlO, C2, CN, and TiO Spectra Following Laser-induced Optical Breakdown

Published on: February 14, 2014

Nanosecond polarization-resolved laser-induced breakdown spectroscopy.

Yaoming Liu1, John S Penczak, Robert J Gordon

  • 1Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607-7061, USA.

Optics Letters
|January 19, 2010
PubMed
Summary

Continuum emission from laser ablation of aluminum is highly polarized, unlike discrete line emission. This polarization can enhance laser-induced breakdown spectroscopy by filtering background noise for clearer results.

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Area of Science:

  • Atomic and Molecular Physics
  • Plasma Physics
  • Spectroscopy

Background:

  • Laser-induced breakdown spectroscopy (LIBS) is a powerful analytical technique.
  • Background continuum emission can reduce spectral resolution in LIBS.
  • Understanding emission polarization in laser-produced plasmas is crucial for signal optimization.

Purpose of the Study:

  • To investigate the polarization characteristics of continuum and discrete line emission from laser-induced aluminum plasmas.
  • To explore the potential of polarization filtering for improving LIBS spectral resolution.
  • To analyze the influence of laser parameters on emission properties.

Main Methods:

  • Ablation of an aluminum target using nanosecond laser pulses.
  • Measurement and comparison of polarization degrees for continuum and line emissions.
  • Investigation of laser fluence and focal position effects on plasma emission.
  • Analysis of emission lifetime and its correlation with the intensity spectrum.

Main Results:

  • Continuum emission exhibits significantly higher polarization than discrete line emission.
  • Laser fluence and focal position influence emission polarization and intensity.
  • Emission lifetime is strongly correlated with the intensity spectrum.
  • Polarization filtering offers a method to reduce continuum background in LIBS.

Conclusions:

  • The distinct polarization of continuum emission provides a viable method for background suppression in LIBS.
  • Optimizing laser parameters can enhance polarization effects for improved LIBS performance.
  • Further development of polarization-based filtering can lead to more sensitive and accurate elemental analysis using LIBS.